wait

I am trying to adjust some bash scripts to make them run on a ( pbs ) cluster. The individual tasks are performed by several script thats are started by a main script. So far this main scripts starts multiple scripts in background (by appending & ) making them run in parallel on one multi core machine. I want to substitute these calls by qsub s to distribute load accross the cluster nodes. However, some jobs depend on others to be finished before they can start. So far, this was achieved by wait statements in the main script. But what is the best way to do this using the grid engine? I already

Specifically, can somebody tell me what is wrong with this piece of code. It should start the threads, so should print "Entering thread.." 5 times and then wait until notifyAll() is called. But, it randomly prints "Entering.." and "Done.." and still keeps waiting on others. public class ThreadTest implements Runnable { private int num; private static Object obj = new Object(); ThreadTest(int n) { num=n; } @Override public void run() { synchronized (obj) { try { System.out.println("Entering thread "+num); obj.wait(); System.out.println("Done Thread "+num); } catch (InterruptedException e) { e

I am new to WPF as well as C#, please bear with me. I have a main window which opens up a new window. Now this new window is a prompt whether or not to overwrite a file, and the main window accesses a public variable in the new window to check for the prompt's result. But I can't get the main window processing to wait until the new window closes. Window1 Win = new Window1(); Win.Show(); if (Win.pr_res == 1) { abc.Text = "File to be overwritten"; File.Delete(_destination); Start(); } else { abc.Text = "Operation Aborted"; } I tried adding a while loop checking another public boolean in the main

I have some Perl code that executes a shell script for multiple parameters, to simplify, I'll just assume that I have code that looks like this: for $p (@a){ system("/path/to/file.sh $p&"); } I'd like to do some more things after that, but I can't find a way to wait for all the child processes to finish before continuing. Converting the code to use fork() would be difficult. Isn't there an easier way? Using fork/exec/wait isn't so bad: my @a = (1, 2, 3); for my $p (@a) { my $pid = fork(); if ($pid == -1) { die; } elsif ($pid == 0) { exec '/bin/sleep', $p or die; } } while (wait() != -1) {}